Characteristics and factors controlling the development of ephemeral gullies in cultivated catchments of black soil region, Northeast China

Zhang, Yongguang; Wu, Yue; Liu, Baoyuan; Zheng, Qiuhong; Yin, Jiayi

doi:10.1016/j.still.2007.02.010

Cited by 170 publications

(93 citation statements)

References 28 publications

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“…The coeffi cient results range between +1 and −1 while two variables are positively proportional to each other when r = 1 and negatively proportional when r = −1. Table II Zhang et al (2007), who show that such width-depth ratio (WDR) values indicate that large amounts of sediment yield erode from each gully. These characteristics, the high length densities measured (see study area section), and the consistency in gully appearance in the catchment indicate that it is sensitive to gully development.…”

Section: Spatial Characteristicsmentioning

confidence: 99%

Catchment scale analysis of the effect of topography, tillage direction and unpaved roads on ephemeral gully incision

Svoray

Markovitch

2009

Earth Surf Processes Landf

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High-resolution airphotographs and digital elevation models (DEMs) were used to study areas prone to gully incision in a small agricultural catchment in northern Israel. Data are analyzed to understand better the integrated effect of environmental and human factors on gully incision. The effect of fl ow accumulation, slope, unpaved roads density and tillage direction on gully width and length is found discontinuous and topography -in the form of the topographic threshold -was found to be the most dominant factor on gully incision in the catchment scale. The topographic threshold coeffi cients observed in Yehezkel catchment were lower than those found in previous studies, due to the effect of large rainfall events during the early winter season, when the soil in fi elds is still unprotected by crops. In addition, a survey of previous studies shows that, in cultivated areas, there is relationship between the topographic threshold coeffi cients a (multiplier) and b (exponent). The infl uence of unpaved roads and tillage direction on gully incision was also found signifi cant and consistent during the two seasons observed, while the nonparametric test showed that it added to the prediction in ~15% of the gullies. Incision points density plot show that of the two parameters, the unpaved roads were found to have greater infl uence on gully-head location than tillage direction. Studying the phenomenon on the catchment scale allows better understanding of the effect of spatial variation on gully-head location. Copyright

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Section: Spatial Characteristicsmentioning

confidence: 99%

Catchment scale analysis of the effect of topography, tillage direction and unpaved roads on ephemeral gully incision

Svoray

Markovitch

2009

Earth Surf Processes Landf

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“…Gully erosion can decrease soil productivity, interfere with farming operations, and degrade landscape quality (Capra and Scicolone 2002;Poesen et al 2003;Foster 2005). Currently, gully erosion in the black soil region of northeast China is severe (Zhang et al 2007b;Wu et al 2008). Shen et al (2003) determined that the total number of gullies was about 250,000 and that the area of farmland eroded by gullies was up to 400,000 ha.…”

Section: Introductionmentioning

confidence: 99%

“…Some research focused on the growth mechanisms of gullies on sloping cultivated land, considering factors such as rainfall, farming practices, and seasonal differences (Meng and Li 2009;Zhang et al 2008). Other research considered the spatial morphological characteristics and formational causes of gullies, and soil loss through gully erosion by monitoring several to dozens of small-scale gullies over 3-5 years with the support of Geographic Information Systems (GIS), Global Positioning System (GPS), and traditional measurement techniques (Zhang et al 2007b;Wu et al 2008;Dong and Wu 2010). Additionally, other work discussed the spatial distribution characteristics, patterns, and dynamic changes of gully erosion at large scale (Yan et al 2010;Wang et al 2012a, b).…”

Section: Introductionmentioning

confidence: 99%

Effect of farmland shelterbelts on gully erosion in the black soil region of Northeast China

et al. 2015

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The black soil region of northeast China is one of the most important grain-producing areas in China. Increasingly severe gully erosion in this region has destroyed much farmland and reduced grain production. We analyzed SPOT5 imagery from 2007 and TM imagery from 2008 to describe the distributions of gullies and farmland shelterbelts in Kedong County and to assess the effect of farmland shelterbelts on gully erosion. The imagery revealed 2311 gullies with average density of 418.51 m km -2 , indicating very serious gully erosion. With increasing slope gradient there was an inverse trend between gully density and shelterbelt density, indicating that farmland shelterbelts can prevent gully erosion. The defense effect of farmland shelterbelts against gully erosion varied with distance: for distances \120 m, the defense effect was consistent and very strong; for distances of 120-240 m, a weak linear decrease was found in the defense effect; and for distances [240 m, the defense effect of the shelterbelts was significantly weaker. We recommend an optimal planting density of farmland shelterbelts for the prevention of gully erosion at 1100-1300 m km -2 .

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“…Moreover, feedback from erosion has further induced soil degradation and lowered agricultural production. The depth of the black soil layer in Songhua River basin was about 0.5-0.8 m before land reclamation, but has now dropped to between 0.2 and 0.4 m throughout most of the basin region (Zhang et al 2007b). However, previous soil protection measures and favorable geographical characteristics (i.e.…”

Section: Introductionmentioning

confidence: 99%

Streamflow changes and its influencing factors in the mainstream of the Songhua River basin, Northeast China over the past 50 years

et al. 2010

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The Songhua River plays a key role in the national development of China, owing to its unique natural condition and resources. Recent changes in the streamflow in the Songhua River are important with regard to local sustainable development and management under the background of global warming and aggravating soil erosion. In order to detect changes in the streamflow, 2) The streamflow series followed the pattern of a wet-dry-wet-dry cycle pattern over the past 50 years. In the mainstream of Songhua River, wet years mainly occurred during the periods of 1955-1966 and 1984-1993, while dry years mainly occurred in the 1970s and after 2000. (3) Within the 50-year scale, the streamflow series appeared in the main periods of circa 33-, 13-and 4-year, in which the 33-year periodicity is the strongest. (4) Precipitation and temperature directly influenced the streamflow in the mainstream of the basin. The discharge was positively correlated with the precipitation and negatively correlated with the temperature. In addition, human activity was another important driving factor for streamflow change. (5) In the mainstream of Songhua River basin, the influences on streamflow can be divided into three periods: 1955-1976, 1977-1997, and 1998-2004. In the first period climate change played a dominant role, and during the latter two periods human influences were enhanced significantly.

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Characteristics and factors controlling the development of ephemeral gullies in cultivated catchments of black soil region, Northeast China

Cited by 170 publications

References 28 publications

Catchment scale analysis of the effect of topography, tillage direction and unpaved roads on ephemeral gully incision

Catchment scale analysis of the effect of topography, tillage direction and unpaved roads on ephemeral gully incision

Effect of farmland shelterbelts on gully erosion in the black soil region of Northeast China

Streamflow changes and its influencing factors in the mainstream of the Songhua River basin, Northeast China over the past 50 years

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